If Black throws in at , White still almost fills the black eye with a killing shape, this time the crossed five.
This looks similar to the success diagrams, but because of the liberty at a Black's eye isn't almost filled anymore. To almost fill White would need to play twice, but thus can't achieve a killing shape anymore. The result is seki.
If White tries to make a ko with , this fails as well as Black has enough liberties to crush the ko with .